Here is the full list of all 13 Zerone 2D achievements.
Complete Origin without collecting any stars (participaction & time stars don't count)
Complete Factory without collecting any stars
Complete Nebula without collecting any stars
Beat the first 8 levels of factory without jumping
Play through the entire credits (with special thanks)
Beat each origin level in under 5 seconds
Beat Factory levels 1, 2, 3, 5, 8, 10, 11, 12, 13, 14, 15, 16, and 17 in under 5 seconds
Beat factory levels 4, 6, 7, 9 and 18 under 10 seconds
Beat each Nebula level in under 5 seconds
Obtain a gold star
Play through a course with music disabled
Reset your save data
Beat a course with inverted controls